With Osaka in control of the match, Williams clashed with chair umpire Carlos Ramos when he handed her game penalty for a string of bad behavior, including an illegal court-coaching violation and verbal and racket abuse.

"You owe me an apology," the U.S. superstar said, arguing about the coaching violation. "I have never cheated in my life!"

The game penalty put Osaka 5-3 up in the second set and she kept her cool to pull off a historic win.